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Rapid and high-resolution 3D printing via photoacid generator induced cationic RAFT polymerization

science China Chemistry 2025年第05期68卷 2010-2016页

作者： Bowen Zhao Jiajia Li Chongyang Yang Xiangqiang Pan Zhengbiao Zhang Jian Zhu State Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow University

Vinyl ethers, while being typical monomers for living cationic polymerization, have limited commercial use due to the poor mechanical properties of their polymers at room temperature. We explored the use of photoacid generators to induce cationic reversible addition-fragmentation chain transfer（RAFT） polymerization for the rapid high-resolution three-dimensional（3D） printing of various vinyl ethers. The process demonstrated controlled molecular weights and narrow molecular weight distributions（MWD）, with monomer conversions exceeding 90% in minutes. Incorporating a crosslinker enabled 3D printing at speeds up to 8.46 cm h-1with layer thicknesses as thin as 50 μm. The mechanical properties of the printed objects were tunable by adjusting resin components, allowing for a range of material characteristics from brittle to elastomeric（tensile strength ranging from 13.9 to 31.7 MPa, Young's modulus ranging from 185.6 to 992.7 MPa and elongation at break ranging from 2.8%to 68.3%）. Moreover, polymer welding facilitated the creation of gradient materials, showcasing the potential for engineered applications of poly（vinyl ethers）(PVEs).

关键词： 3D printing cationic RAFT polymerization vat photopolymerization vinyl ether

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Molecular engineering of Benzobisoxazole-Based Conjugated Polymers for High-Performance Organic Photodetectors and Fingerprint Image Sensors

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Energy & Environmental Materials 2025年第1期8卷 155-167页

作者： Cheol Shin Won Jo Jeong Ezgi Darici Lee Jong Baek Park Hyungju Ahn Seyeon Baek Myeong In Kim Dae Sung Chung Kang-Il Seo In Hwan Jung Department of Organic and Nano Engineering and Human-Tech Convergence Program Hanyang University CLAP Co. Ltd. Pohang Accelerator Laboratory POSTECH Department of Chemical Engineering Pohang University of Science and Technology (POSTECH)

Various novel conjugated polymers(CPs) have been developed for organic photodetectors(OPDs),but their application to practical image sensors such as X-ray,R/G/B,and fingerprint sensors is *** this article,we report the entire process from the synthesis and molecular engineering of novel CPs to the development of OPDs and fingerprint image *** synthesized six benzo[1,2-d:4,5-d']bis(oxazole)(BBO)-based CPs by modifying the alkyl side chains of the CPs.

关键词： alkyl side chain engineering fingerprint image sensor on/off ratio organic photodetector specific detectivity

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Kinetic investigation of the energy storage process in graphene fiber supercapacitors:Unraveling mechanisms,fabrications,property manipulation,and wearable applications

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Carbon Energy 2025年第1期7卷 133-173页

作者： Juan Zhang Wenwen Liu Minzhi Du Qingli Xu Minren Hung Ruifang Xiang Meng Liao Xinhou Wang Bingjie Wang Aiping Yu Kun Zhang Key Laboratory of Textile Science and Technology(Donghua University) Ministry of EducationCollege of TextilesDonghua UniversityShanghaiChina Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooONCanada Laboratory of Advanced Materials State Key Laboratory of Molecular Engineering of PolymersDepartment of Macromolecular ScienceFudan University2205 Songhu RdShanghai 200438China College of Mechanical Engineering Donghua UniversityShanghai 201620China

Graphene fiber supercapacitors(GFSCs)have garnered significant attention due to their exceptional features,including high power density,rapid charge/discharge rates,prolonged cycling durability,and versatile weaving ***,inherent challenges in graphene fibers(GFs),particularly the restricted ion-accessible specific surface area(SSA)and sluggish ion transport kinetics,hinder the achievement of optimal capacitance and rate *** existing reviews on GFSCs,a notable gap exists in thoroughly exploring the kinetics governing the energy storage process in *** review aims to address this gap by thoroughly analyzing the energy storage mechanism,fabrication methodologies,property manipulation,and wearable applications of *** theoretical analysis of the energy storage process,specific parameters in advanced GF fabrication methodologies are carefully summarized,which can be used to modulate nano/micro-structures,thereby enhancing energy storage *** particular,enhanced ion storage is realized by creating more ion-accessible SSA and introducing extra-capacitive components,while accelerated ion transport is achieved by shortening the transport channel length and improving the accessibility of electrolyte *** on the established structure-property relationship,several critical strategies for constructing optimal surface and structure profiles of GF electrodes are *** on the exceptional flexibility and wearability of GFSCs,the review further underscores their potential as foundational elements for constructing multifunctional e-textiles using conventional textile *** conclusion,this review provides insights into current challenges and suggests potential research directions for GFSCs.

关键词： fiber-shaped supercapacitor graphene ion storage ion transport wearable application

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Thermo-responsive methylcellulose/hyaluronic acid-mesalamine hydrogel in targeted drug delivery for ulcerative colitis

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RSC Advances 2025年第18期15卷 14126-14135页

作者： Kuo, Sheng-Nan Wu, Pei-Xhan Huang, Shu-Ling Hsu, Yu-Ci Huang, Jen-Huang Department of Chemical Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Chemical Engineering National United University Miaoli36003 Taiwan Science/International Master Program of Translation Medicine National United University Miaoli36003 Taiwan

Current treatments for ulcerative colitis (UC), including mesalamine (Me) enemas, face limitations such as poor colonic retention, systemic side effects, and suboptimal patient compliance. To address these challenges, this study developed a thermo-responsive hydrogel combining hyaluronic acid-mesalamine (HA-Me) conjugates with methylcellulose (MC), providing a targeted and sustained drug delivery platform for UC treatment. HA-Me conjugates were synthesized via a nucleophilic addition-elimination reaction, with FT-IR and 1H-NMR confirming successful conjugation and a grafting ratio of 12.45%. Rheological analysis revealed a lower critical solution temperature (LCST) of 36.7-37.7 °C, ensuring gelation at body temperature when the MC concentration was 5-7 wt%. The optimized hydrogel exhibits intestinal retention properties, thereby improving drug bioavailability. The results confirmed that this hydrogel not only improved drug release time but also provided a protective barrier for inflamed wounds, facilitating wound healing, reducing the risk of reinfection, and improving medical compliance. Its mucoadhesive properties further supported effective drug delivery and localized therapeutic effects. This study highlights the potential of the MC/HA-Me hydrogel as a platform for overcoming the limitations of conventional UC treatments, offering opportunities for tailored therapeutic applications and future clinical development. © 2025 The Royal Society of Chemistry.

关键词： Targeted drug delivery

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Polyethyleneimine modified Au core Rh shell nanodendrites for light-promoted nitrite reduction reaction at low concentration

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Journal of Energy Chemistry 2025年第4期103卷 400-407页

作者： Zhe Wang Xiaohui Wang Mengzhu Yun Xinyao Shi Xue Xiao Yan Liu Fan Yang Yucheng Jiang Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710062ShaanxiChina Department of Public Security Northwest University of Political Science and LawXi’an 710122ShaanxiChina College of Chemistry and Materials Science Weinan Normal UniversityWeinan 714099ShaanxiChina

Ammonia(NH_(3))is a fundamental chemical in agriculture and an ideal hydrogen ***,NH_(3)synthesis strategies with high efficiency,energy conservation,environmental friendliness,and sustainability are desired *** nitrite(NO_(2)~-)reduction reaction(NO_(2-)RR)to NH_(3)offers a feasibly low-energy consumption and continuable approach to replace industrial NH_(3)***,polyethyleneimine(PEI)modified Au core Rh shell nanodendrites(Au@Rh-NDs)nanohybrid(Au@Rh-NDs/PEI)with branched structure is synthesized,which achieves the high NH_(3)yield(1.68 mg h^(-1)mg_(cat)^(-1))and Faradaic efficiency(FE)of 95.86%for NO_(2)~--RR at-0.39 V potential in neutral ***,the introduction of PEI significantly enhances the electroactivity of Au@Rh-NDs at low concentration of 1 mM NaNO_(2),which originates from the enrichment function of PEI for NO_(2)~-*** addition,the Au basement permits the sustainable solar power to expedite the NO_(2)~--RR at Au@Rh-NDs/PEI owing to the localized surface plasmon resonance(LSPR)of the Au core *** work may provide an admissible tactic to build excellent catalysts on account of organic molecule-mediated interfacial engineering in a variety of fields of catalysis and electrocatalysis.

关键词： Ammonia Shell-core structure Interfacial engineering Nitrite reduction reaction Photothermal and photoelectric effect

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Enhancing waste sorting and recycling efficiency: robust deep learning-based approach for classification and detection

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Neural Computing and Applications 2025年第6期37卷 4567-4583页

作者： Sayem, Faizul Rakib Islam, Md. Sakib Bin Naznine, Mansura Nashbat, Mohammad Hasan-Zia, Mazhar Kunju, Ali K Ansaruddin Khandakar, Amith Ashraf, Azad Majid, Molla Ehsanul Kashem, Saad Bin Abul Chowdhury, Muhammad E. H. Department of Electrical and Electronic Engineering University of Dhaka Dhaka Bangladesh Department of Biomedical Engineering Military Institute of Science and Technology Dhaka Bangladesh Department of Computer Science & Engineering Rajshahi University of Engineering & Technology Rajshahi6204 Bangladesh Chemical Engineering Department University of Doha for Science and Technology Doha Qatar Department of Electrical Engineering Qatar University Doha2713 Qatar Computer Applications Department Academic Bridge Program Qatar Foundation Doha Qatar Department of Computing Science AFG College With the University of Aberdeen Doha Qatar

Given the severity of waste pollution as a major environmental concern, intelligent and sustainable waste management is becoming increasingly crucial in both developed and developing countries. The material composition and volume of urban solid waste are key considerations in processing, managing, and utilizing city waste. Deep learning technologies have emerged as viable solutions to address waste management issues by reducing labor costs and automating complex tasks. However, the limited number of trash image categories and the inadequacy of existing datasets have constrained the proper evaluation of machine learning model performance across a large number of waste classes. In this paper, we present robust waste image classification and object detection studies using deep learning models, utilizing 28 distinct recyclable categories of waste images comprising a total of 10,406 images. For the waste classification task, we proposed a novel dual-stream network that outperformed several state-of-the-art models, achieving an overall classification accuracy of 83.11%. Additionally, we introduced the GELAN-E (generalized efficient layer aggregation network) model for waste object detection tasks, obtaining a mean average precision (mAP50) of 63%, surpassing other state-of-the-art detection models. These advancements demonstrate significant progress in the field of intelligent waste management, paving the way for more efficient and effective solutions. © The Author(s) 2024.

关键词： Deep learning for waste management Intelligent waste management Object detection in waste management Sustainable waste processing Urban solid waste Waste image classification

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Reduced erosion and its erosion reducing mechanism of gun propellants by octaphenylsilsesquioxane

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材料科学技术（英文版） 2025年第4期207卷 86-94页

作者： Taixin Liang Jiaxin Lu Fei Xiao Hua Guo Chunzhi Li Mukun He Baosheng Liu Zeinhom M.El-Bahy Nawaa Ali H.Alshammari Xin Liao Salah M.El-Bahy Zhongliang Xiao Zhanhu Guo School of Environment and Safety Engineering North University of ChinaTaiyuan 030051China School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Luzhou North Chemical Industries Co. LTDLuzhou 646000China School of Environment and Safety Engineering North University of ChinaTaiyuan 030051China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Luzhou North Chemical Industries Co. LTDLuzhou 646000China College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of ScienceNorthern Border UniversityArar 73222Saudi Arabia School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Mechanical and Civil Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon TyneNE1 8STUK

Low erosion high-energy propellant is one of the research directions to extend the weapon's life and improve the weapon's *** this study,energetic propellants containing different corrosion in-hibitors were designed and *** bomb tests and semi-confined bomb experiments were used to investigate the burning and erosion properties of the *** mechanism of erosion-reducing of titanium dioxide(titania,TiO2),talc,and octaphenylsilsesquioxane(OPS)on the propellant was com-paratively *** results show that OPS has the lowest burning rate and the longest burning time,and a minimized loss of fire force,with the best effect of explosion heat *** erosion reduction efficiency of OPS is twice that of TiO2 and *** mechanism analysis shows that the decomposition and heat absorption of OPS can effectively reduce the thermal erosion effect and carbon erosion,and the gas produced can reduce the loss of chamber pressure and form a uniformly distributed nano-SiO2 protective *** solid-state high-efficiency organosilicon erosion inhibitor is an important guide for designing high-energy low-erosion gun propellants.

关键词： Octaphenylsilsesquioxane Propellant Erosion inhibitors High efficiency

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Light-driven Self-sustained Rolling of Cylinder Hydrogels with Fast and Anisotropic Responses

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Chinese Journal of Polymer science 2025年第4期43卷 548-555页

作者： Qing-Li Zhu Han-Lei Cheng Wei-Xuan Liu Yin-Bin Xiao Xin-Lei Wu Josef Breu Wei Hong Zhi-Jian Wang Qiang Zheng Zi-Liang Wu Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310058China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055China Bavarian Polymer Institute and Department of Chemistry University of BayreuthUniversitätsstrasse 3095440BayreuthGermany Institute for Chemical Reaction Design and Discovery Hokkaido UniversitySapporo001-0021Japan

Achieving continuous motions typically requires dynamic external stimuli for cyclic deformation,or crafted geometries with intricate modules to form a self-regulated feedback loop upon static *** is still a grand challenge to realize self-sustained motion in soft robots subject to unchanging environment,without complex geometry or a control *** this work,we report soft robots based on an anisotropic cylindrical hydrogel showing self-regulated,continuous rolling motions under constant light *** robots are animated by mirror-symmetry-breaking induced by photothermal strain *** self-sustained motion is attributed to the fast and reversible deformation of the gel and the autonomous refresh of the irradiated region during the rolling *** hydrogel robots can reach a rolling speed of 1.27 mm·s^(-1)on a horizonal surface and even climb a ramp of 18°at a speed of 0.57 mm·s^(-1)in an aqueous ***,the hydrogel robots can overcome an obstacle,with rolling direction controllable through irradiation angle of the light and local irradiation on selective *** work suggests a facile strategy to develop hydrogel robots and may provide unforeseen inspirations for the design of self-regulated soft robots by using other intelligent materials.

关键词： Self-sustained motions Light-driven Rolling Anisotropic hydrogels Soft robots

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Material Design for Durable Lubricant-Infused Surfaces That Can Reduce Liquid and Solid Fouling

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ACS Nano 2025年第19期19卷 18075-18094页

作者： Wang, Fan-Wei Sun, Jianxing Tuteja, Anish Department of Chemical Engineering University of Michigan Ann ArborMI48109 United States Biointerfaces Institute University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Macromolecular Science and Engineering Program University of Michigan Ann ArborMI48109 United States

Liquid and solid fouling is a pervasive problem in numerous natural and industrial settings, significantly impacting energy efficiency, greenhouse emissions, operational costs, equipment lifespan, and human health. Inspired by pitcher plants, recently developed lubricant-infused surfaces (LISs) demonstrate resistance to both liquid and solid accretion under diverse environmental conditions, offering a potential solution to combat various foulants such as ice, bacteria, and mineral deposits. However, the commercial viability for most fouling-resistant LISs has thus far been compromised due to the challenges associated with maintaining a stable lubricant layer during operation. This review aims to address this important concern by providing systematic material design guidelines for fabricating durable LISs. We discuss fundamental design principles, methods for evaluating fouling resistance, and strategies to prevent lubricant loss. By presenting a comprehensive design methodology for this important class of materials, this review aims to aid future advancements in the field of antifouling surfaces, potentially impacting a variety of industries ranging from marine engineering to medical device manufacturing. © 2025 American chemical Society.

关键词： Biofouling

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A review on reactive oxygen species-induced mechanism pathways of pharmaceutical waste degradation:Acetaminophen as a drug waste model

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Journal of Environmental sciences 2025年第1期147卷 688-713页

作者： Saba Humayun Maan Hayyan Yatimah Alias Department of Chemistry Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia University of Malaya Centre for Ionic Liquids University of MalayaKuala Lumpur 50603Malaysia Chemical Engineering Program Faculty of Engineering and TechnologyMuscat UniversityMuscat P.C.130Oman

Innately designed to induce physiological changes,pharmaceuticals are foreknowingly hazardous to the *** oxidation processes(AOPs)are recognized as a set of contemporary and highly efficient methods being used as a contrivance for the removal of pharmaceutical *** reactive oxygen species(ROS)are formed in these processes to interact and contribute directly toward the oxidation of target contaminant(s),a profound insight regarding the mechanisms of ROS leading to the degradation of pharmaceuticals is fundamentally *** conceptualization of some specific reaction mechanisms allows the design of an effective and safe degradation process that can empirically reduce the environmental impact of *** review mainly deliberates themechanistic reaction pathways for ROS-mediated degradation of pharmaceuticals often leading to complete mineralization,with a focus on acetaminophen as a drug waste model.

关键词： Wastewater treatment Ionic liquid Hydroxyl radical Superoxide Pharmaceutical contaminant Advanced oxidation process Deep eutectic solvent Hydrogen peroxide

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